Author
Reza Paknejad
Bio: Reza Paknejad is an academic researcher from Shahid Rajaee Teacher Training University. The author has contributed to research in topics: Cantilever & Fiber metal laminate. The author has an hindex of 2, co-authored 3 publications receiving 8 citations.
Papers
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TL;DR: In this article, the effect of geometrical and material parameters on free vibrations of fiber metal laminates (FMLs) was studied using first-order shear deformation theory (FSDT) and Fourier series method.
Abstract: Fiber metal laminates (FMLs) are high-performance hybrid structures based on alternating stacked arrangements of fiber-reinforced plastic (FRP) plies and metal alloy layers. In this paper, effect of some geometrical and material parameters on free vibrations of FML plates was studied. The first-order shear deformation theory (FSDT) as well as the Fourier series method was used to analytically solve the governing equations of the composite plate. The accuracy of the used method was verified by comparing the Rayleigh-Ritz analytical method and the ABAQUS finite element software (numerical) method. The results indicated that some of the important parameters like sequence of metal layers, aspect ratio (a /b ) of plate and orientation of composite fibers were important factors affecting free vibration of the FMLs.
10 citations
01 Jan 2013
4 citations
TL;DR: In this paper, the effect of the Al layers on contact force and deflection of the plates is investigated by considering the interaction between the impactor and the target in the impact analysis.
Abstract: In this study, dynamic response of cantilever Fiber Metal Laminate (FML) plates subjected to the impact of a large mass is studied. Aluminum (Al) sheets are placed instead of some Fiber Reinforced Plastic (FRP) layers. The effect of the Al layers on contact force and deflection of the plates is investigated by considering the interaction between the impactor and the target in the impact analysis. A two degrees-of-freedom system consisting of springs- masses and finite element modeling of the ABAQUS/Explicit software were employed to model the interaction between the impactor and the target. The results indicate that some parameters like the layer sequence, mass and velocity of the impactor, mass of the target are important factors which affect the impact response of the plates.
Cited by
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TL;DR: In this article, the vibration characteristic of the fibre metal laminates (FMLs) plate was experimentally studied by impulse excitation techniques under fixed-free and fixed-fixed boundary conditions, and the results indicated that with the presence of aluminium alloy plates in the composite layers, the natural frequency will increase as the value of stiffness increase.
7 citations
TL;DR: In this paper , the vibration characteristic of the fibre metal laminates (FMLs) plate was experimentally studied by impulse excitation techniques under fixed-free and fixed-fixed boundary conditions, and the results indicated that with the presence of aluminium alloy plates in the composite layers, the natural frequency will increase as the value of stiffness increase.
5 citations
01 Jan 2014
TL;DR: It is confirmed that the World Health Organization has approved the use of nanofiltration membranes for the recovery of phosphorous-contaminated wastewater from barges in the Mediterranean.
Abstract: هلاقم تاعلاطا هدیکچ لماک یشهوژپ هلاقم :تفایرد 07 تشهبیدرا 1393 :شریذپ 22 دادرخ 1393 :تیاس رد هئارا 02 رهم 1393 ا هدافتسا دروم تیزوپماک .تسا هتفرگ رارق یسررب دروم یتیزوپماک تاحفص خساپ يور رب لااب ياهامد و هدننز هبرض لکش رثا رضاح شهوژپ رد ز داعبا ،یسکوپا/هشیش سنج 3 × 120 × 120 هدننز هبرض مرج ،رتمیلیم 7 مرگولیک دروخرب تعرس و 4 / 1 یم هیناث رب رتم شیامزآ ماجنا تهج .دشاب هدش هدافتسا يومهس و یطورخم ،يورک مین ،تخت هدننز هبرض عون راهچ زا هدننز هبرض لکش رثا یسررب يارب و ،ناتفا هنزو هاگتسد زا هبرض هنیشیب ،دروخرب نامز ،بیسآ نازیم .تسا اجباج و هدش بذج يژرنا ،دروخرب يورین ي هدش هسیاقم رگیدکی اب فلتخم هدننز هبرض راهچ يارب یی نهپ هدننز هبرض رس هچره .دنا هنیشیب و رتمک دروخرب نامز دشاب رت همه زا یطورخم هدننز هبرض بیسآ هیحان .دوب دهاوخ رتشیب دروخرب يورین ي یصخشم بیسآ هیحان زرم ياراد رگید هنومن هس فلاخ رب تخت هدننز هبرض .تسا رتشیب یمن خساپ يور رب امد رثا یسررب تهج نینچمه .دشاب و قاتا يامد نیب ار شیامزآ ياهامد ،تیزوپماک 150 هداد رییغت دارگیتناس هجرد هنیشیب دننام ییاهرتماراپ و يژرنا و ییاجباج ،دروخرب يورین ي هتفرگ رارق یسررب دروم هدش بذج هنیشیب امد شیازفا اب .دنا شهاک دروخرب يورین ي یم شیازفا ییاجباج و امد رییغت اب هدش بذج يژرنا یلو دبای یمن ینادنچ رییغت دنک . :ناگژاو دیلک نییاپ تعرس هبرض یتیزوپماک قرو هدننز هبرض لکش امد
5 citations
TL;DR: In this article, a review on free vibration analysis of shear deformable isotropic beams, plates, shells, laminated composites and sandwich structures based on various theories is presented.
Abstract: Abstract A high specific stiffness, high specific strength, and tailoring the properties for specific application have attracted the attention of the researchers to work in the field of laminated composites and Sandwich structures. Rapid use of these laminated composites and Sandwich structures necessitated the development of new theories that suitable for the bending, buckling and vibration analysis. Many articles were published on free vibration of beams, plates, shells laminated composites and sandwich structures. In this article, a review on free vibration analysis of shear deformable isotropic beams, plates, shells, laminated composites and sandwich structures based on various theories and the exact solution is presented. In addition to this, the literature on finite element modeling of beams, plates, shells laminated composites and sandwich structures based on classical and refined theories is also reviewed. The present article is an attempt to review the available literature, made in the past few decades on free flexural vibration response of Fiber Metal laminated Composites and Sandwich panels using different analytical models, numerical techniques, and experimental methods.
3 citations
01 Jan 2014
TL;DR: Hedayatian et al. as discussed by the authors performed numerical and experimental analyses on grid cylindrical composite structures under high velocity impact and found that the penetration of the composite structures was limited by the number of cylinders.
Abstract: دییامن هدافتسا لیذ ترابع زا هلاقم نیا هب عاجرا يارب : Please cite this article using: M. Hedayatian, Gh. Liaghat, Gh. Rahimi, M. H. Pol, Numerical and experimental analyses projectile penetration in grid cylindrical composite structures under high velocity Impact, Modares Mechanical Engineering, Vol. 14, No. 9, pp. 17-26, 2014 (In Persian) یسررب يددع یبرجت و هباترپ ذوفن لااب تعرس اب تیزوپماک رد هناوتسا کبشم ياه يا
2 citations